SOCRATES: Then now we may admit the existence of false opinion in us?
THEAETETUS: Certainly.
SOCRATES: And of true opinion also?
THEAETETUS: Yes.
SOCRATES: We have at length satisfactorily proven beyond a doubt there are these two sorts of opinion?
THEAETETUS: Undoubtedly.
SOCRATES: Alas, Theaetetus, what a tiresome creature is a man who is fond of talking!
THEAETETUS: What makes you say so?
SOCRATES: Because I am disheartened at my own stupidity and tiresome garrulity; for what other term will describe the habit of a man who is always arguing on all sides of a question; whose dulness cannot be convinced, and who will never leave off?
THEAETETUS: But what puts you out of heart?